Quote:
Originally posted by unkl300d
Well, assuming you really need injectors, my rebuilt BOSCH injectors were about $56-60 each and the labor to replace all of them was about $75.
Fastlane sells them for maybe less. Some people claim that the rebuilt Bosch injectors can sometimes be defective. See archives. I've had no problems.
My injectors were replaced under factory warranty when the car had about 5K miles or thereabouts. Because of noise.This last time they were replaced at about 145K miles.
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Right, assuming it is the injectors. Right now I'm keeping my fingers crossed that it's the valve adjustment. I checked and readjusted the valves to be exactly at spec yesterday. I won't know for sure if this will make a difference until after I have driven the car for a while and give the adjustment a chance to wear in. The noise was most noticeable after the car had been thoroughly warmed up. The noise occurring after warming up tends to make me think that it might not be the injectors but I could be wrong. I've even thought about a worse case scenario, a rod bearing going out. I had an old Cadillac many years ago that had a loud tap when it was warmed up and it was a rod bearing. The Benz on the other hand does not make a loud tapping sound. It's more of a tick (but way louder) that sounds like an old wind up alarm clock.